Electric lamp



E. M. WATSON Jan. 8, 1935.

ELECTRIC LAMP Filed Nov. 29, 1933 INVENTUR. Es TELL MRI Arson,

.FZE'E ATTURNEY.

Patented Jan. 8, 1935 I mormcnm Eltell M. Watson, Cleveland Heights, H0,usignor to General Electric Comparing corpora- -tion of New YorkApplication November 29, 1933. Serial No. 700,287 7 Claims. (01. 116-32)My invention relates to electric lamps and sim- 12 is welded. and a disc19 which is attached to ilar devices comprising an electric energytranssaid ring 15 by a collar or ring 20 of glass and lati'on element,such as a filament, sealed in a which is welded to leadwire 11. The ring15 and bulb disc 19 are of a metal or alloy which has substan-Here'tofore, the practice has been to provide a tially the same.coefilcient of expansion as the separate base for such devices which iscemented glass parts sealed thereto. One such alloy which to the closedneck of the bulb, the mount," comalso wets" well to the glass consistssubstantially prising the energy translation element and its of 73 percent iron and '27 per cent chromium. supporting structure, beingsupported by the bulb. The base flanges are preferably of diflerentwidth According to my invention, a metal base is and in this instancehave been stitfened by a sealed directly to the open neck of the bulb,thus downwardly bent flange 21. The glass collar 20 actuallyconstituting a portion of the bulb wall, of the base serves tofacilitate attachment of the and the mount is supported by the saidmetal base bulb-.13 to the base as the neck thereof is sealedindependently of the glass bulb. The said base is to said collar, andalso serves to support the filaprovided with engagement means formounting ment 10 by means of a plurality of wires 22 parthe lamp in asocket and is especially adaptable tially embedded therein and extendingupward for precision lamps, in which the light source, or and engagingintermediate sections of said filafilament, must bear a definitepredetermined rement. The lamp is preferably exhausted through lation'to the base. The present practice consists aperture 23 in disc 19 whichis then closed by a in mounting the filament in the bulb and then body24 of glass sealed thereto.

attachingthe base to the bulb so that it is accu- The modification f yinv n ion shown in rately located with respect to the filament. Ac-Figs- 4 and 5 comprises a bu b 25 in which is cording to the presentinvention the filament is t d, tw n ad W s 6 a d '7, the filaaccuratelymounted directly on the base so that it ment 28. The wi es 26. 2'1 exend upwa d from 25 bears a definite predetermined relation to the enthebase 29. The wire 26 is welded to etal gagement means on said base,after which the ring 30 which is provided with a pair 01 pp s bulb issealed to the base. The lam can be used disp s d and utward y xtendinflan s or lu s to advantage in projectors comprising a reflector 31 and32 and which is sealed to the neck of the or lens with respect to whichthe filament must u b 5 as own. The wire 27 is welded to disc 30 beaccurately located, since standard lamps made 33 which is sealed to e 6-1 1 r ng 34 01 glass according to my invention may be interchangedwhich is also sealed to ring 30. The intermediate without the necessityof focusing adjustments. po t of the filament are upported by a plu-Further features and advantages of my invention 1 1' Wires 35 extendingm a glass arbor 36 will appear from the following detailed descripwhichpr f a y s ta t an w dly and 35 tion thereof and from the drawing. p yextending 8 p 37 01! ring 30. T e In the drawing, Fig. 1 is aperspective view of lamp is evacuated through pe ure 38 in disc 33 anincandescent electric 1 1 my invention; which is then closed by a mass39 of glass sealed Fig. 2 is a longitudinal section therethrough; Fig.theret 3 is a transverse section through said lamp along A socketsuitable for either of the lamps d 0 line 33 of Fig. 2; Fig. 4 is alongitudinal section scribed is shown in 6- This device consists 40through a modified lamp of my invention; Fig. 5 of an insulating dy 50in which is mounted'a is a transverse section through said modificationmetal shell 4 ml a p n a h of which conalong line 55 of Fig. 4; and Fig.6 is a perspecstitutes a terminal element. The shell is protive viewpartially in section of a socket suitabl vided with a recessed portionor annular shoulder 5 for use with the lamp of my invention. 43 d a p 01flanges 4 nd 4 so posed Referring now to the drawing and particularly asto Provide unequal p n n therebetween of to the lamp illustrated inFigs. 1, 2 and 3, said substantially the same size as the lamp base lampcomprises a. filament 10 the ends of which flanges. Each of th fla s 445 is provided are mounted on lead wires 11 and 12 in the bulb with adownwardly extending lip 46 which pre- 5 13. The opposite ends of eachof the lead wires vents the base from being turned counterclock- 50 aremounted on separate conductive portions of wise after insertion and withdepressed portions the base 14. The base comprises a metal ring 15 47which lock the base flanges in place after they having a pair ofoppositely disposed flanges or have been inserted thereunder by aclockwise rolugs 16 and 1'? extending therefrom and an intation of thelamp. Pin 42 engages the base disc 66 wardly extending lug or lip 18 towhich lead 'wire and is urged upward against the bottom of said disc byspring 48. To insert the lamp in the socket, it is advanced toward saidsocket so that the base flanges are brought opposite the proper openingsbetween the socket flanges 44, 45 whereupon the said lamp is pusheddownward and turned clockwise until the base flanges are located behindthe depressed portions 47 of said socket flanges. In this position, thebase flanges engage the lower surface of the socket flanges between lip46 thereof and depression 4'7, and the disc of the lamp base is inengagement with pin 42.

What I claim as new and desire to secure by Letters Patents oi theUnited States is:

1. An electric lamp or similar device comprising a bulb, a basecomprising a metal ring portion sealed to the walls of an opening insaid bulb and having engagement means for mounting said lamp and a metaldisc sealed to said ring portion over said opening insaid bulb throughthe medium of an insulating collar of plastic material, an energytranslation element in said bulb, and a pair of leading-in wires eachconnected at one end to one end of said translation element, theopposite ends of said leading-in wires being attached respectively tosaid ring and disc portions of said base.

2. An electric lamp or similar device comprising a bulb, a basecomprising a metal ring portion sealed to the walls of an opening insaid bulb and having engagement means for mounting said lamp and a metaldisc sealed to said ring portion through the medium of an insulatingcollar of plastic material, an energy translation element in said bulb,a pair of leading-in wires each connected at one end to one end of saidtranslation element, the opposite ends of said leading-in wires beingattached respectively to said ring and disc portions of said base, and aplurality of support wires engaging portions of said translation elementand having their ends embedded in said insulating collar.

3. An electric lamp or similar device comprising a bulb, a basecomprising a metal ring portion sealed to the walls of an opening insaid bulb and having engagement means for mounting said lamp and aninwardly extendinglug and a metal disc sealed to said ring portion oversaid opening in said bulb through the medium of an insulating collar ofplastic material, said lug projecting into said bulb through saidinsulating collar, an energy translation element in said bulb, and apair of leading-in wires each connected at one end to one end of saidtranslation element, the opposite ends of said leading-in wires beingattached respectively to said inwardly projecting lug and disc portionsof said base.

4. An electric lamp or similar device comprising a bulb, a basecomprising a metal ring portion sealed to the walls of an opening insaid bulb and having laterallyand outwardly extending engagement meansfor mounting said lamp and a metal disc sealed to said ring portion oversaid opening in said bulb through the medium of an insulating collar ofplastic material, an energy translation element in said bulb, and a pairof leading-in wires each connected at one end to one end of saidtranslation element, the opposite ends of said leading-in wires beingattached respectively to said ring and disc portions of said base.

5. An electric, lamp or similar device comprising a bulb, a basecomprising a metal ring portion sealed to the walls of an opening insaid bulb and having laterally outwardly extending engagement means anda lug extending inwardly into said bulb and a metal disc sealed to saidring portion through the medium of an insulating collar of plasticmaterial, an energy translation element in said bulb, a pair ofleading-in wires each connected at one end to one end ofsaid translationelement. the opposite ends of said leading-in wires being attachedrespectively to said inwardly extending lug and disc portions of saidbase, an insulating arbor mounted on said lug and extending upwardly insaid bulb, and a plurality of support wires mounted on said arbor andengaging portions of said energy translation element.

6. An electric lamp or similar device comprising a bulb, a basecomprising a metal terminal ring portion sealed to the walls of anopening in said bulb and having engagement means for mounting said lampand a metal terminal disc sealed to said terminal ring portion over saidopening in said bulb through the medium of an insulating collar offusible material, said terminal disc constituting the end wall of thebulb, an energy translation element in said bulb, and a pair ofleading-in wires each connected at one end to one end of saidtranslation element, the opposite ends of said leading-in wires beingattached respectively to said ring and disc portions of said base.

7. An electric lamp or similar device comprising a bulb, a basecomprising a metal terminal ring portion sealed to the walls of anopening in said bulb and having engagement means for mounting said lampand a metal terminal disc sealed to said terminal ring portion over saidopening in said bulb through the medium of an insulating collar offusible material, said terminal disc constituting the end wall of thebulb, an energy translation element in said bulb, and a pair ofleading-in wires each connected at one end to one end of saidtranslation element, the opposite ends of said leading-in wires beingattached respectively to said ring and disc portions of said base, andat least one support wire engaging a portion of said translation elementand having its end embedded in said collar.

ESTELL M. WATSON.

